Install Antivirus Software in the ownCloud Appliance

Introduction

This guide details how to enable a virus scanner in the ownCloud
Appliance.

Install ClamAV and Related Components

First, start the appliance and go to "System and domain settings".

When there, log in with the administrator account. After you have done
that, click Software and open "Package Management", as in the screenshot below.

From there, you first need to install ClamAV. To do this, in the third
field, next to the one containing the text "Package name", type in
the phrase: "clamav" (1). Doing so filters the list of packages to
only those matching that phrase. In the filtered list of packages, check
the checkboxes next to "clamav" (2), "clamav-freshclam", and
"clamav-daemon".

Updates are run based on the configured time interval in the applicable
Cron job. In the example below, the update would run every 47 minutes:

# m h dom mon dow command
47 * * * * /usr/bin/freshclam --quiet

If there are errors running the freshclam process, check if a process is
blocking the log file, by running the following command:

lsof /var/log/clamav/freshclam.log

If you want to refresh the ClamAV database manually, follow these steps:

# Gently end the freshclam process with this command:
sudo pkill -15 -x freshclam
# Start the refresh process again with this command:
sudo freshclam

When the app is enabled — but is not configured or has an incorrect configuration — it will reject all uploads for the entire instance. To avoid this situation, make sure the ClamAV service is running and you have the execution mode correctly configured in ownCloud.